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US 10,494,740 B2Granted
Dual-terminated polyamide for high speed spinning application
AssigneeAdvanSix Resins & Chemicals LLC
InventorsYu Zhang, Min Wang, Shuwen Peng, David J. Loy, Jie Wei, Tingzhi Chen
Life of this patent
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Abstract
Methods of producing a polyamide filaments and fibers are provided. The methods include providing a dual-terminated polyamide and spinning the dual-terminated polyamide at a speed of 3500 m/min to 8000 m/min to form a fiber. In one embodiment, the polyamide has an amine endgroup concentration of 25 mmol/kg to 40 mmol/kg and a carboxyl endgroup concentration of 18 mmol/kg to 50 mmol/kg. Fibers and yarns comprising polyamide filaments and fibers formed from the method are also disclosed.
Claims18
A method of producing a plurality of fibers, the method comprising:
- providing a dual-terminated polyamide-6 (PA-6) having an amine endgroup concentration of 25 mmol/kg to 40 mmol/kg, a carboxyl endgroup concentration of 18 mmol/kg to 50 mmol/kg, and a relative viscosity of 2.6 RV to 3.0 RV;
- and
- spinning the dual-terminated polyamide-6 (PA-6) at a speed of 3500 m/min to 8000 m/min to form the fibers.
Dependencies are inferred from the claim text.